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复合材料已经应用于很多工业领域,为扩大复合材料的需求,准确评价它的机械性能对于评价其安全性是非常重要的,但由于复合材料的断裂模式和机理复杂,作这个评价并不容易。我们以损伤力学为基础,提出了一种复合材料机械性能的评价方法,由于织物复合材料结构复杂,可以想像,我们不能轻易地评价出损伤过程中复合材料的机械性能。因此,本文给出一种方法,通过模拟含有某些损伤的复合材料的机械特性。这些损伤包括纤维束内的横向断裂或纤维束之间的剥离。在拉伸载荷下纤维编织复合材料的第一个断裂发生在横向纤维束内,可以确认计算结果同实验结果一致。此外,我们提出了一种新的试验方法,可以得到各向异性材料的偏轴强度。它是通过旋转支撑销产生简单弯曲,旋转销可以在试件上产生均匀的应力状态,因而得到精确的强度。另一方面,缠绕已经广泛应用于纤维增强复合材料的生产工艺中。在缠绕中,纤维取向是一个很重要的设计参数。但是,纤维取向与芯模形状有关,预测纤维取向并不容易。因此,用于片状缠绕结构的仿真生产系统得到发展。一般来说,这种系统对于普通技术人员必须是容易掌握的。所以,创立了图形用户界面(GUI),使设计更加方便,结果这个系统对用户非常友善。本文讨论了算法和模型化方法,并且展示了这种系统的可用?
Composites have been used in many industrial fields. To evaluate the mechanical properties of composite materials, it is very important to evaluate its mechanical properties. However, the evaluation of composite materials is not easy due to the complicated fracture mode and mechanism. Based on damage mechanics, we propose a method to evaluate the mechanical properties of composite materials. Due to the complex structure of fabric composites, it is conceivable that we can not easily evaluate the mechanical properties of composites during damage. Therefore, this paper presents a way to simulate the mechanical properties of composites with some damage. These lesions include transverse breaks within the fiber bundle or peel between the fiber bundles. The first fracture of the fiber braided composite under tensile load occurred in the transverse fiber bundles, confirming that the calculated results are in agreement with the experimental results. In addition, we propose a new experimental method to obtain the off-axis strength of anisotropic materials. It produces a simple bend by rotating the support pin, which produces a uniform stress state on the test piece and therefore gives an accurate strength. On the other hand, winding has been widely used in the production of fiber-reinforced composite materials. In winding, fiber orientation is a very important design parameter. However, fiber orientation is related to the shape of the mandrel and predicting the fiber orientation is not easy. Therefore, a simulation production system for a sheet-wound structure has been developed. In general, such a system must be readily graspable by a skilled artisan. Therefore, the creation of a graphical user interface (GUI) to make the design more convenient, the result of this system is very friendly to the user. This article discusses algorithms and modeling methods and shows how such a system can be used.